Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bcc5ce241a6a4fa…

MALICIOUS

PDF

78.2 KB Created: 2021-05-27 22:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4896e9fda7dffb71f27bdb218b821570 SHA-1: 12e7bfa99220b799007b0e7ae9a1ebf82d77b5b7 SHA-256: 0bcc5ce241a6a4fa6b928656879ae07786c399c6089621798c6ca9c9410d4aa2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jottigo.ru/123?utm_term=animation+movies++sites PDF link annotation
    • https://puzuzabijil.weebly.com/uploads/1/3/2/8/132814257/domazabu.pdfIn PDF document text
    • https://zukifetev.weebly.com/uploads/1/3/4/7/134725253/wixemavelubelaxalo.pdfIn PDF document text
    • https://mufogijagojar.weebly.com/uploads/1/3/1/0/131070489/fafej.pdfIn PDF document text
    • https://tonibakak.weebly.com/uploads/1/3/5/3/135346506/6caf40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485308/normal_5fca6b7217e88.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4492901/normal_60afe30220f06.pdfIn PDF document text
    • https://rifakinuzofu.weebly.com/uploads/1/3/0/8/130815009/zozuwomojunofubelu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374542/normal_5fd703c34f5eb.pdfIn PDF document text
    • https://sajaxelofokaxus.weebly.com/uploads/1/3/0/7/130776185/2824802.pdfIn PDF document text
    • https://gazukevofuw.weebly.com/uploads/1/3/4/5/134597640/mujetuvol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384296/normal_6011af5e993ca.pdfIn PDF document text
    • https://kugibiredatejag.weebly.com/uploads/1/3/4/3/134319346/kowatu_dojoze_xegat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379377/normal_6001b94a3b214.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457014/normal_60046c05c2a3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/74ab58f5-1302-446a-a73b-7738b1d47e56/boondocks_episode_download_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46524fdf-6a5d-4f10-af91-dda9b5628159/48169174456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7279e3e9-bb40-4b83-bac1-e44b5914a1e6/cisco_7941_plantronics_headset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fe255f9-eddf-4396-b24d-fdc193008f32/gusaro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19d191c0-aa1d-4f4d-ba66-f9fd96c278bd/ritosajejejimatewon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb1a6016-de0d-49fc-98e0-c887655d41e6/fibeduguwowosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cd4f754-84ed-4667-b377-c7c0757fd98b/what_is_the_safest_city_in_new_york_state.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE749 4540 bytes
SHA-256: 99e0d487ae72b24fd14cf44b65b8cde074d3471152e09b174b774845a37003dc
font_01_sfnt_off0000f693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF693 11436 bytes
SHA-256: 42f4d2f1f01b79a20c56f53d096ae674db8abc6c9b84caabd3ea73721e282e88
font_02_sfnt_off00011d5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5C 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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